1. Rust cleaning, sand blasting whole trailer frame before painting.
2. Two layers of primer after treatment of sand blasting then two layers of final coating of color. 3. Before delivery, do wax spray process to against the trailer body suffer seawater corrosion during shipping. 4. Flat butt automatic welding machine(splice plate machine), to ensure the steel is flat, and seam is

welded by one side in shape by two sides. So there is no minimal deformation, also clean and beautiful

seam on both sides, round and smooth transfers.5. Automatic flat board turning-over machine, it is used in the procedure of the board turn-over after being welding. With a combination of the flat butt automatic welding machine, make the safety

and efficiency.
6. Tank rolling machine, the tanker body is shaped by one time, all of which features the machine good in appearance, efficient in production.